Test:
Percentages II - Ambitious
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Question 1:
Write as a percentage
$1\frac{2}{5}$
A
$50\%$
B
$30\%$
C
$140\%$
D
$14\%$
Question 2:
Find a number if
$4\%$
of that number is
$15$
A
$37.5$
B
$60$
C
$6$
D
$375$
Question 3:
In a park grows
$300$
oaks. How many trees are in the park, if the oaks make up
$25\%$
of all trees?
A
$600$
B
$650$
C
$120$
D
$1200$
Question 4:
Find
$8\%$
of
$4km$
A
$400m$
B
$32m$
C
$320m$
D
$3km$
Question 5:
Cost of manufacturing parts at the factory is
$680$
pounds. The introduction of new technologies has allowed to reduce the cost by
$2\%$
. What is the cost of manufacturing parts after changes?
A
$\pounds 666.4$
B
$\pounds 672$
C
$\pounds 670$
D
$\pounds 666$
Question 6:
When grinding wheat, the yield of flour is
$80\%$
. How much wheat should be used to get
$610kg$
kg of flour?
A
$762kg$
B
$690kg$
C
$700kg$
D
$762.5kg$
Question 7:
The width of the rectangle is
$6cm$
and is
$32\%$
of its length. Find the perimeter of the rectangle.
A
$48cm$
B
$47cm$
C
$49cm$
D
$49.5cm$
Question 8:
The alloy of gold and silver contains
$40\%$
of gold. What is the mass of the alloy, if the gold weighs
$335g$
?
A
$837.5g$
B
$800g$
C
$820g$
D
$810g$
Question 9:
The height of the rectangular parallelepiped is
$5cm$
. It is
$40\%$
of the length and
$60\%$
of the width. Find the volume of the parallelepiped.
A
$625{m}^{3}$
B
$625c{m}^{3}$
C
$620c{m}^{3}$
D
$623c{m}^{3}$
Question 10:
Find
$35\%$
of the sum of
$1\frac{13}{14}$
and
$\frac{3}{4}$
A
$0.04$
B
$\frac{1}{4}$
C
$0.4$
D
$4$
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